vasculogenesis
Technical term in biology for the de novo formation of blood vessels from endothelial precursor cells, distinct from angiogenesis.
Vasculogenesis is a process of blood vessel formation seen in the early stages of embryonic development.
血管新生 (angiogenesis) refers to the formation of new blood vessels from pre-existing ones, while 脈管形成 (vasculogenesis) is the formation of blood vessels from endothelial progenitor cells.
Compound of 脈管 (vascular, from 脈 'vein/pulse' and 管 'tube/duct') and 形成 (formation). The reading みゃっかん is a contraction of みゃくかん.